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Slide 1
Slide 1

Signal Resistance of the Current Mirror
Signal Resistance of the Current Mirror

... Av = (-)0.5Rchfe/hie Rin = hie at each input ...
L8Q1 What is the voltage drop across an ideal ammeter 0 V L8Q2
L8Q1 What is the voltage drop across an ideal ammeter 0 V L8Q2

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project2 - UTK-EECS
project2 - UTK-EECS

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100W+, 98% Efficient Buck-Boost LED Driver

... 4.7VIN to 60VIN, Short Circuit Proof with LED Protection & Diagnostics Here’s the latest in our growing family of high power, high performance LED drivers designed to simplify power delivery to high ...
VICO -- Voltage Input Current Output transmitter
VICO -- Voltage Input Current Output transmitter

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V = 40 + j35 volts I = 6 + j3 amps The above is the pd across a circuit
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... The Wheatstone Bridge is a commonly used circuit for making electrical measurements. When will the current through the ammeter be equal to zero? This will happen if we choose the resistor to be just right! If we assume no current flow through the ammeter then: ...
Electronic Circuits and Devices: ELEE 3455
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... Assume that the speaker needs 20[V]pp to deliver clear acoustical output. Design an equivalent circuit for an amplifier that would deliver this output when connected between the pick-up and the speaker. E2.2. An amplifier has been connected as shown below, with a signal source and a load connected. ...
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Electronics_exercises_files/extra 2
Electronics_exercises_files/extra 2

... The bias circuit below is used in a design with VG=5V and RS=1kΩ. For an enhancement MOSFET with kn’(W/L) =2mA/V2, the source voltage was measured and found to be 2V. What must Vt be for this device? If a device for which Vt is 0.5V less is used, what does Vs become? What bias current results? ...
Lecture 04 - people.vcu.edu
Lecture 04 - people.vcu.edu

< 1 ... 976 977 978 979 980 981 982 983 >

Current mirror

A current mirror is a circuit designed to copy a current through one active device by controlling the current in another active device of a circuit, keeping the output current constant regardless of loading. The current being 'copied' can be, and sometimes is, a varying signal current. Conceptually, an ideal current mirror is simply an ideal inverting current amplifier that reverses the current direction as well or it is a current-controlled current source (CCCS). The current mirror is used to provide bias currents and active loads to circuits. It can also be used to model a more realistic current source (since ideal current sources don't exist).The circuit topology covered here is one that appears in many monolithic ICs. It is a Widlar mirror without an emitter degeneration resistor in the follower (output) transistor. This topology can only be done in an IC as the matching has to be extremely close and cannot be achieved with discretes.Another topology is the Wilson mirror. The Wilson mirror solves the Early effect voltage problem in his design.
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